python连接HBase

发布时间：2019-09-12 07:58:26编辑：auto阅读（2279）

环境

hadoop 2.7.0
hbase 1.2.1
Thrift 0.9.0

启动hbase的Thrift RPC

./hbase-daemon.sh start thrift

生成python的Thrift模块

cd hbase-1.2.1/hbase-thrift/src/main/resources/org/apache/hadoop/hbase/thrift
thrift --gen py Hbase.thrift

#生成gen-py文件
.
├── gen-py
│   ├── hbase
│   │   ├── constants.py
│   │   ├── Hbase.py
│   │   ├── Hbase-remote
│   │   ├── __init__.py
│   │   └── ttypes.py
│   └── __init__.py
└── Hbase.thrift
#把gen-py/hbase复制到项目下

.
├── hbase
│   ├── constants.py
│   ├── Hbase.py
│   ├── Hbase.pyc
│   ├── Hbase-remote
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── ttypes.py
│   └── ttypes.pyc
└── hbase_client.py

hbase_client.py

# # -*- coding: utf-8 -*-

from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol

from hbase import Hbase
from hbase.ttypes import ColumnDescriptor, Mutation


class HbaseClient(object):
    def __init__(self, host='localhost', port=9090):
        transport = TTransport.TBufferedTransport(TSocket.TSocket(host, port))
        protocol = TBinaryProtocol.TBinaryProtocol(transport)
        self.client = Hbase.Client(protocol)
        transport.open()

    def get_tables(self):
        """
        获取所有表
        """
        return self.client.getTableNames()

    def create_table(self, table, *columns):
        """
        创建表
        """
        self.client.createTable(table, map(lambda column: ColumnDescriptor(column), columns))

    def put(self, table, row, columns, attributes=None):
        """
        添加记录
        @:param columns {"k:1":"11"}
        """
        self.client.mutateRow(table, row, map(lambda (k,v): Mutation(column=k, value=v), columns.items()), attributes)

    def scan(self, table, start_row="", columns=None, attributes=None):
        """
        获取记录
        """

        scanner = self.client.scannerOpen(table, start_row, columns, attributes)
        while True:
            r = self.client.scannerGet(scanner)
            if not r:
                break
            yield dict(map(lambda (k, v): (k, v.value),r[0].columns.items()))

if __name__ == "__main__":
    client = HbaseClient("192.168.19.74", 9090)
    client.create_table("student", "name", "coruse")
    print(client.get_tables())
    client.put("student", "1", {"name:":"zhangsan", "coruse:art": "88", "coruse:math": "12"})
    client.put("student", "2", {"name:":"lisi", "coruse:art": "90", "coruse:math": "100"})
    client.put("student", "3", {"name:":"lisi2"})
    for v in client.scan("student", columns=["name"]):
        print(v)
    for v in client.scan("student"):
        print(v)

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